In Python we need not to declare datatype while declaring a variable like C or C++. We can simply just assign values in a variable. But if we want to see what type of numerical value is it holding right now, we can use type(), like this:

Python Data Type – String

The string is a sequence of characters. Python supports Unicode characters. Generally, strings are represented by either single or double quotes.

a = "string in a double quote"
b= 'string in a single quote'
print(a)
print(b)
# using ',' to concatenate the two or several strings
print(a,"concatenated with",b)
#using '+' to concate the two or several strings
print(a+" concated with "+b)

The above code produce output like below picture-

Python Data Type – List

The list is a versatile data type exclusive in Python. In a sense, it is the same as the array in C/C++. But the interesting thing about the list in Python is it can simultaneously hold different types of data. Formally list is an ordered sequence of some data written using square brackets([]) and commas(,).

#list of having only integers
a= [1,2,3,4,5,6]
print(a)
#list of having only strings
b=["hello","john","reese"]
print(b)
#list of having both integers and strings
c= ["hey","you",1,2,3,"go"]
print(c)
#index are 0 based. this will print a single character
print(c[1]) #this will print "you" in list c

The above code will produce output like this-

Python Data Type – Tuple

Tuple is another data type which is a sequence of data similar to list. But it is immutable. That means data in a tuple is write protected. Data in a tuple is written using parenthesis and commas.

#tuple having only integer type of data.
a=(1,2,3,4)
print(a) #prints the whole tuple
#tuple having multiple type of data.
b=("hello", 1,2,3,"go")
print(b) #prints the whole tuple
#index of tuples are also 0 based.
print(b[4]) #this prints a single element in a tuple, in this case "go"

The output of this above python data type tuple example code will be like below image.

Dictionary

Python Dictionary is an unordered sequence of data of key-value pair form. It is similar to the hash table type. Dictionaries are written within curly braces in the form key:value. It is very useful to retrieve data in an optimized way among a large amount of data.

Comments

@Shubham, This is not necessary. Double are required compulsory for text/strings whether you use them as Key or Value. Whenever you are using numeric as key or value, it is not mandatory that you have to use double quotes but if you are using string then you have to use it. For ex.:
Case 1 : Numeric as Key without quotes and String as value
a={1:”One”,2:”Two”,”Age”:35}
>>> a[1]
‘One’

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